Electronic water pump with extremely high temperature resistance and self-adaption

Abstract

The invention relates to an extremely-high-temperature-resistant self-adaptive electronic water pump which comprises a U-shaped elastic piece, a heating expansion device, an arc sliding rod device, an opening copper pipe, a Venturi glass pipe, a transition round pipe, a large centrifugal wheel, a small centrifugal wheel, a bidirectional blade impeller, a waterproof ventilation device, aerogel cooling gel, a heat dissipation aluminum plate and other core assemblies. High-temperature anti-freezing liquid is pressurized twice through a Venturi glass tube and pressurized for the third time through a conical transition round tube, then enters a liquid changing pool to be mixed with low-temperature liquid for cooling, and circularly cools a rotor and a pump head; the heating expansion device pushes the U-shaped elastic piece to expand along with temperature rise, and the gap between the arc sliding rod device and the open copper pipe is enlarged to improve the liquid flow heat exchange efficiency. The bidirectional blade impeller rotates to generate bidirectional airflow, and the water pump is cooled through cooperation of the aerogel cooling gel and the cooling aluminum plate. The structure is compact, cooling mechanisms are linked, the problem of multi-dimensional failure in the extremely high temperature environment is effectively solved, and adaptability is high.

Description

Technical Field

[0001] This invention relates to the field of electronic water pump technology, specifically to an electronic water pump with adaptive high-temperature resistance. Background Technology

[0002] As a core component of the cooling cycle in automotive thermal management and energy storage systems, the electric water pump's heat dissipation performance directly affects the system's reliable operation. However, in special operating conditions such as tropical and desert regions or high-power-density new energy vehicles, the electric water pump not only needs to cope with the heat generated by its own motor, controller, and other components, but also needs to withstand the combined effects of extreme external high-temperature environments, resulting in operating temperatures exceeding 150°C. Under such extremely high-temperature conditions, existing conventional heat dissipation structures often fail to meet the heat dissipation requirements, easily leading to a series of failure risks such as overheating and carbonization of motor windings, burnout of power devices, and embrittlement of structural materials due to high temperatures, seriously affecting the service life and operational safety of the electric water pump.

[0003] Currently, some patented technologies attempt to improve the heat dissipation performance of electronic water pumps by optimizing the external heat dissipation structure. Examples include adding heat dissipation pipes to the casing, arranging heat exchange tubes on the impeller casing, adding an arc-shaped heat dissipation bracket to the base, or attaching a heat sink to the casing (e.g., CN223305967U, CN120576106A, CN120520724A, CN120506400A). While these solutions improve heat dissipation capacity to some extent, they still have significant limitations: some structures are complex, occupy a large space, have high manufacturing costs, or lack feasibility in practical applications. More importantly, when facing continuous extremely high temperature conditions, the above improvements often only achieve limited cooling and cannot fundamentally solve the problem of system overheating failure caused by temperature accumulation.

[0004] Therefore, there is an urgent need for a new type of electronic water pump design that is compact, adaptable, and highly reliable, capable of effective heat dissipation in extremely high-temperature environments, solving the problem of water pump failure caused by extremely high-temperature environments, thereby ensuring that the motor, controller and other key components can still work stably under high-temperature conditions and effectively extending the service life of the water pump. Summary of the Invention

[0005] To address the aforementioned problems, this invention provides an electronic water pump with extreme high-temperature adaptability that solves the problem of failure at extremely high temperatures while also ensuring compatibility with assembly space and adaptability to operating conditions.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problems is as follows: an electronic water pump with extreme high temperature resistance and self-adaptation, including a pump head, a rotor assembly, a stator plastic-coated assembly, a stator assembly and a controller, and further including a thermal expansion self-adaptation mechanism, a flow guiding heat dissipation component, a liquid changing heat dissipation component and a self-heating component disposed inside the pump body;

[0007] The adaptive thermal expansion mechanism is located between the rotor assembly and the stator plastic-coated assembly and includes an arc slide bar device, a U-shaped spring sheet, and a thermal expansion device embedded in the U-shaped spring sheet; the thermal expansion device expands and deforms due to heat, driving the U-shaped spring sheet to expand, thereby adjusting the flow channel gap between the arc slide bar device and the open copper tube.

[0008] The heat dissipation assembly includes an open copper tube, a venturi glass tube embedded in the open copper tube, and a tapered transition tube; the open copper tube is arranged between the slots of the stator assembly, and the open copper tube forms a multi-pressurization flow path by connecting the embedded venturi glass tube and the transition tube.

[0009] The liquid exchange heat dissipation assembly includes a liquid exchange tank and a large centrifugal wheel and a small centrifugal wheel disposed in the liquid exchange tank. The liquid exchange tank is connected to a transition circular pipe through a liquid channel. The large centrifugal wheel and the small centrifugal wheel are used to mix high-temperature liquid and low-temperature liquid and form a pressure difference to drive the cooling cycle.

[0010] The self-heating component includes a bidirectional blade impeller, a waterproof and breathable device, an aerosol cooling adhesive, and a heat dissipation aluminum plate; the aerosol cooling adhesive is assembled on the heat dissipation aluminum plate; the waterproof and breathable device is embedded between the outer side wall of the upper part of the Venturi glass tube and the inner side wall of the upper part of the open copper tube, and is used to drive the bidirectional blade impeller to rotate through the vaporized gas pressure difference to generate bidirectional airflow for self-heating.

[0011] The flow-guiding heat dissipation component, the liquid exchange heat dissipation component, the self-heating component, and the thermal expansion adaptive mechanism work together to achieve adaptive cooling of the electronic water pump under the combined conditions of extremely high temperature environment and its own operation heat dissipation.

[0012] Preferably, the difference in thermal conductivity between the open copper tube and the Venturi glass tube creates a vapor channel between the two tubes. The vapor generated by the vaporization of the high-temperature liquid forms a stable pressure difference within this vapor channel, which provides the initial driving force for the high-temperature liquid, achieving the first pressurization. The Venturi glass tube includes a tapered inlet section and a throat outlet section. After the high-temperature liquid enters through the tapered inlet section, the flow rate is doubled due to the contraction and flow restriction at the throat outlet section, completing the second pressurization. The diameter of the inlet end of the transition circular tube is larger than that of the outlet end. Through the contraction effect of the conical channel, the high-temperature liquid after the second pressurization is further accelerated and pressurized, achieving the third pressurization. The high-temperature liquid after the three-stage pressurization is then introduced into the liquid exchange tank through the transition circular tube.

[0013] Preferably, the thermal expansion device is made of rubber, and the U-shaped spring is engaged between the rotor assembly and the arc-shaped slide bar device. A sliding space is reserved between the arc-shaped slide bar device and the stator plastic-coated assembly. When the temperature rises, the thermal expansion device expands symmetrically on both sides along the inside and outside direction of the pump body, pushing the U-shaped spring to spring outward synchronously, and driving the arc-shaped slide bar device to slide towards the stator plastic-coated assembly, thereby adjusting the flow channel gap between the arc-shaped slide bar device and the open copper tube.

[0014] Preferably, the airflow generated by the rotation of the upper blade of the bidirectional blade impeller acts on the liquid exchange tank and the stator plastic-coated assembly through the air passage for heat dissipation, and the airflow generated by the rotation of the lower blade of the bidirectional blade impeller acts on the controller below the heat dissipation aluminum plate for heat dissipation.

[0015] Preferably, the pump head and the pump body are sealed together by a pump body sealing ring, and the heat dissipation aluminum plate is sealed together with the pump body by a heat dissipation aluminum plate sealing ring.

[0016] Preferably, the aerosol coolant is composed of a variety of metal particles, with a thermal conductivity as low as 0.013 W / (mK) and a temperature resistance rating as high as 650℃.

[0017] Preferably, the stator plastic-coated assembly covers the outside of the stator assembly, and the rotor assembly is coaxially arranged inside the stator assembly. The rotor assembly is supported by bearings and rotates relative to the stator assembly under the drive of the magnetic field generated by the stator assembly, thereby converting electrical energy into mechanical energy to drive the pump.

[0018] Preferably, the fluid exchange tank is located below the fixed shaft in the stator assembly, and the bidirectional blade impeller is connected to the lower end of the fixed shaft via a bearing.

[0019] Preferably, the number of the arc-shaped sliding rod devices corresponds to the number of open copper tubes. Each arc-shaped sliding rod device includes a cylindrical end and an arc-shaped tail. The cylindrical end and the arc-shaped tail are connected by a connecting rod, and the cylindrical end slides over the inlet end of the open copper tube.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. This invention achieves adaptive cooling of the electronic water pump under extreme high temperature environments and its own heat dissipation conditions through the synergistic action of the flow-guiding heat dissipation component, the liquid exchange heat dissipation component, the self-heating component, and the thermal expansion adaptive mechanism. Through the unique integrated structure combination of the open copper tube with embedded Venturi tube and tapered transition round tube, the high temperature antifreeze is pressurized and accelerated in multiple stages in sequence. Then, it is connected with the liquid exchange tank to form a closed-loop mechanism of "pressurization and flow guidance - mixing heat exchange - circulating cooling". Combined with the high temperature protection of heat dissipation aluminum plate and aerosol cooling gel, the overall heat dissipation efficiency is significantly improved, enabling the water pump to operate stably in environments above 150℃. This fundamentally solves the problems of motor overheating and carbonization, controller burnout and material embrittlement failure, and effectively extends the service life of the water pump.

[0022] 2. This invention integrates adaptive components such as a U-shaped spring sheet, a thermal expansion device, and a circular arc slide bar device to achieve automatic flow channel adjustment within a limited space, taking into account both heat dissipation performance and installation adaptability;

[0023] 3. The components of this invention adopt an integrated layout, and all functional components are embedded in the existing electronic water pump cavity. The structure is compact and does not increase the installation volume. It is suitable for assembly in narrow spaces and has strong versatility.

[0024] 4. This invention utilizes a bidirectional blade impeller to achieve forced air cooling, aerosol cooling adhesive to provide high-temperature insulation, and a waterproof and breathable device to assist gas flow in heat dissipation, forming a multi-path synergistic cooling system that significantly improves the overall heat dissipation efficiency and operational reliability. Attached Figure Description

[0025] Figure 1 This is a three-dimensional structural diagram of the hidden pump head of the present invention;

[0026] Figure 2 yes Figure 1 Enlarged view of point C in the middle;

[0027] Figure 3 This is a schematic diagram of the inverted three-dimensional structure of the thermal expansion adaptive mechanism in this invention;

[0028] Figure 4 This is a top view of the present invention;

[0029] Figure 5 yes Figure 4 Sectional view along AA;

[0030] Figure 6 This is a top view of the internal structure of the pump body of the present invention;

[0031] Figure 7 yes Figure 6 Sectional view along BB. Detailed Implementation

[0032] The following will combine Figure 1-7The present invention will be described in detail below. The illustrative embodiments and descriptions herein are used to explain the invention, but are not intended to limit the invention.

[0033] An electronic water pump with extreme high temperature resistance and self-adaptation includes a pump head 1, a rotor assembly 2, a stator plastic-coated assembly 6, a stator assembly 20 and a controller 18, and also includes a thermal expansion self-adaptation mechanism, a flow guiding heat dissipation component, a liquid exchange heat dissipation component and a self-heating component disposed inside the pump body.

[0034] The adaptive thermal expansion mechanism is located between the rotor assembly and the stator plastic-coated assembly and includes an arc-shaped slide bar device 5, a U-shaped spring 3, and a thermal expansion device 4 embedded in the U-shaped spring. Specifically, the U-shaped spring is engaged between the rotor assembly and the arc-shaped slide bar device, and a sliding space is reserved between the arc-shaped slide bar device and the stator plastic-coated assembly. The thermal expansion device expands and deforms under heat, driving the U-shaped spring to expand, which in turn drives the arc-shaped slide bar device to slide toward the stator plastic-coated assembly, thereby adjusting the flow channel gap between the arc-shaped slide bar device and the open copper tube 7. In this application, the thermal expansion device is made of rubber. When the temperature rises, the thermal expansion device expands symmetrically on both sides in the direction of the inside and outside of the pump body, pushing the U-shaped spring to spring outward synchronously.

[0035] The number of arc-shaped sliding rod devices corresponds to the number of open copper tubes. Each arc-shaped sliding rod device includes a cylindrical end and an arc-shaped tail, which are connected by a connecting rod. The cylindrical end slides and covers the inlet end of the open copper tube. Multiple arc-shaped sliding rod devices can be spliced ​​together to form a complete circular arc-shaped sliding rod device.

[0036] The heat dissipation assembly includes an open copper tube, a Venturi glass tube 8 embedded in the open copper tube, and a tapered transition tube 9. The open copper tube is arranged between the slots of the stator assembly, and the open copper tube is connected to the transition tube through the embedded Venturi glass tube to form a multi-pressurization flow path. Specifically, the difference in thermal conductivity between the open copper tube and the Venturi glass tube creates a vapor channel between the two tubes. The vapor generated by the vaporization of the high-temperature liquid forms a stable pressure difference in this vapor channel, which provides the initial driving force for the high-temperature liquid, achieving the first pressurization. The Venturi glass tube includes a tapered inlet section and a throat outlet section. After the high-temperature liquid enters through the tapered inlet section, the flow rate is doubled by the contraction and flow restriction of the throat outlet section, completing the second pressurization. The diameter of the inlet end of the transition tube is larger than the diameter of the outlet end. Through the contraction effect of the tapered channel, the high-temperature liquid after the second pressurization is further accelerated and pressurized, achieving the third pressurization. The high-temperature liquid after the three-stage pressurization is introduced into the heat exchange tank through the transition tube, ensuring that the high-temperature liquid is quickly introduced into the heat exchange tank to complete the heat exchange.

[0037] The liquid exchange heat dissipation assembly includes a liquid exchange tank 22 and a large centrifugal wheel 13 and a small centrifugal wheel 12 disposed in the liquid exchange tank. The liquid exchange tank is connected to the transition circular pipe through the liquid channel 10. The large centrifugal wheel and the small centrifugal wheel are used to mix high-temperature liquid and low-temperature liquid and form a pressure difference to drive the cooling cycle.

[0038] The self-heating assembly includes a bidirectional blade impeller 15, a waterproof and breathable device 23, an aerosol cooling adhesive 19, and a heat dissipation aluminum plate 16. The aerosol cooling adhesive is mounted on the heat dissipation aluminum plate to insulate against high temperatures and enhance heat dissipation. This aerosol cooling adhesive is composed of a variety of metal particles, with a thermal conductivity as low as 0.013 W / (mK) and a temperature resistance rating as high as 650℃. The waterproof and breathable device is embedded between the outer wall of the upper part of the Venturi glass tube and the inner wall of the upper part of the open copper tube. It is used to drive the bidirectional blade impeller to rotate through the pressure difference of the vaporized gas to generate bidirectional airflow for self-heating. Specifically, the airflow generated by the rotation of the upper blade of the bidirectional blade impeller acts on the liquid exchange tank and the stator plastic-coated assembly through the air passage 11 for heat dissipation, and the airflow generated by the rotation of the lower blade of the bidirectional blade impeller acts on the controller below the heat dissipation aluminum plate for heat dissipation.

[0039] The flow-guiding heat dissipation component, the liquid exchange heat dissipation component, the self-heating component, and the thermal expansion adaptive mechanism work together to achieve adaptive cooling of the electronic water pump under the combined conditions of extremely high temperature environment and its own operation heat dissipation.

[0040] Furthermore, the pump head and pump body 24 are sealed together by the pump body sealing ring 21, and the heat dissipation aluminum plate is sealed together with the pump body by the heat dissipation aluminum plate sealing ring 17.

[0041] Furthermore, the stator plastic-coated assembly covers the outside of the stator assembly, and the rotor assembly is coaxially arranged inside the stator assembly. The rotor assembly is supported by bearing 14 and rotates relative to the stator assembly under the drive of the magnetic field generated by the stator assembly, thereby converting electrical energy into mechanical energy to drive the pump. The fluid exchange tank is located below the stator shaft in the stator assembly, and the bidirectional blade impeller is connected to the lower end of the stator shaft through bearings.

[0042] During implementation, when the electronic water pump fails due to overheating of its own motor and controller, the heat dissipation mechanism of this invention is as follows: The open copper tube is designed with an open structure, a Venturi glass tube is embedded within it, and a waterproof and breathable device is installed between the outer wall of the upper part of the Venturi glass tube and the inner wall of the upper part of the open copper tube. High-temperature liquid vaporization occurs, and the liquefied gas enters the glass-copper tube (a combination of the open copper tube and the Venturi glass tube) through the waterproof and breathable device. Due to the significant difference in heat dissipation and thermal conductivity between the copper and glass tubes, a pressure difference is generated before and after the gas passes through the glass-copper tube, thereby driving the bidirectional blade impeller to rotate. Meanwhile, aerosol cooling adhesive is installed on the lower heat dissipation aluminum plate. The aerosol cooling adhesive is composed of a variety of metal particles, with a thermal conductivity as low as 0.013W / (mK) and a temperature resistance rating of up to 650℃. It can fully adapt to the problem of water pump failure caused by the extremely high temperature of the electronic water pump and its own high operating temperature. The upper blade of the bidirectional blade impeller generates airflow through rotation, which blows to the upper liquid exchange tank and the stator assembly plastic-coated structure, thereby continuously cooling the high temperature liquid and motor. At the same time, the lower blade also rotates and generates airflow that blows to the lower heat dissipation aluminum plate, continuously cooling the controller below. This solves the problem of controller and motor overheating caused by the high temperature of the water pump's own motor and controller.

[0043] When an electric water pump experiences extremely high temperatures in an external environment, leading to problems such as brittle failure of the pump material and overheating and carbonization failure of the motor, the heat dissipation mechanism of this invention is as follows: Open copper tubes and Venturi glass tubes are designed between the slots of the motor (i.e., between the slots of the stator assembly). An arc-shaped sliding rod device and a U-shaped spring device are designed between the rotor assembly and the stator plastic-coated assembly. When the water pump operates in an extremely high-temperature environment, the internal antifreeze temperature rises. The thermal expansion device gradually expands and deforms to both sides as the temperature rises, thereby pushing the U-shaped spring to spring outwards. This drives the arc-shaped sliding rod device to slide within the sliding space reserved between the arc-shaped sliding rod device and the stator plastic-coated assembly, thus gradually widening the space between the arc-shaped sliding rod device and the open copper tube. The flow channel gap increases the flow velocity of the high-temperature liquid. At the same time, the high-temperature antifreeze inside the pump quickly enters the liquid channel along the arc-shaped push rod device and the Venturi glass tube embedded in the open copper tube, and then flows into the liquid exchange tank below the stator shaft. After exchanging liquid with the low-temperature liquid in the liquid exchange tank, the overall temperature drops rapidly. The low-temperature liquid after liquid exchange enters the space between the rotor assembly and the stator plastic-coated assembly and enters the space between the pump head and the bidirectional blade impeller, thereby reducing the high temperature heat at the pump head. The high-temperature liquid and the low-temperature liquid circulate repeatedly through the liquid exchange tank, continuously cooling the pump materials and motor, thus solving the problems of pump material embrittlement and failure and motor overheating and carbonization failure caused by extremely high external temperatures.

[0044] When the electronic water pump experiences problems such as motor burnout, controller burnout, and material embrittlement due to overheating caused by the combined effects of its own heat dissipation and extremely high external temperatures, the operating mechanism of the electronic water pump in this invention is as follows: When the water pump operates in an extremely high-temperature environment, the high-temperature antifreeze inside the pump is thrown onto the inner wall of the stator plastic-coated assembly by the rotation of the bidirectional blade impeller. It then enters the liquid channel along the arc-shaped push rod device and the Venturi glass tube embedded in the open copper tube. After being pressurized twice by the Venturi glass tube, the high-temperature fluid enters the transition tube, which is designed with a conical structure, further pressurizing the high-temperature liquid a third time. After passing through the transition tube, the high-temperature liquid, under pressure, directly rushes into the liquid exchange tank below the stator shaft, thereby driving the large and small centrifugal wheels in the liquid exchange tank to perform circumferential centrifugal motion. The high-temperature liquid mixes with the liquid in the liquid exchange tank and rapidly cools down. Furthermore, the cooled antifreeze in the liquid exchange tank... Under the stirring action of the large and small centrifugal impellers inside, a pressure difference is formed on both sides, which pushes the low-temperature cooled liquid into the rotor assembly and pump head. This cycle repeats continuously, cooling the motor, controller, and water pump as a whole. During this process, through the unique integrated structure combination of the open copper tube with embedded Venturi tube and conical transition round tube, the high-temperature antifreeze is pressurized and accelerated in multiple stages. Then, it is connected with the liquid exchange tank to form a closed-loop mechanism of "pressurization and flow guidance - mixing and heat exchange - circulating cooling". The cooling mechanisms between the various devices in this invention are interlocked, with a reasonable structure and compact spatial layout. It can not only fully solve the problems of motor burnout and water pump material embrittlement failure caused by the superposition of heat dissipation during water pump operation and external extremely high temperature environment, but also solve the problem of extreme high temperature failure while taking into account the assembly space and adaptability of electronic water pumps, thereby improving the heat dissipation and reliability of the entire thermal management system.

[0045] The technical solutions provided by the embodiments of the present invention have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of the embodiments of the present invention. The descriptions of the embodiments above are only for helping to understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the embodiments of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. An electronic water pump with extreme high-temperature adaptability, characterized in that: It includes a pump head (1), a rotor assembly (2), a stator plastic-coated assembly (6), a stator assembly (20), and a controller (18), as well as a thermal expansion adaptive mechanism, a flow guiding heat dissipation component, a liquid exchange heat dissipation component, and a self-heating component located inside the pump body; The thermal expansion adaptive mechanism is located between the rotor assembly and the stator plastic-coated assembly and includes an arc slide bar device (5), a U-shaped spring sheet (3) and a thermal expansion device (4) embedded in the U-shaped spring sheet; the thermal expansion device expands and deforms due to heat, driving the U-shaped spring sheet to expand, thereby adjusting the flow channel gap between the arc slide bar device and the open copper tube (7); The heat dissipation assembly includes an open copper tube, a venturi glass tube (8) embedded in the open copper tube, and a tapered transition tube (9); the open copper tube is arranged between the slots of the stator assembly, and the open copper tube forms a multi-pressurization flow path by connecting the embedded venturi glass tube and the transition tube. The liquid exchange heat dissipation assembly includes a liquid exchange tank (22) and a large centrifugal wheel (13) and a small centrifugal wheel (12) disposed in the liquid exchange tank. The liquid exchange tank is connected to the transition circular pipe through a liquid channel (10). The large centrifugal wheel and the small centrifugal wheel are used to mix high-temperature liquid and low-temperature liquid and form a pressure difference to drive the cooling cycle. The self-heating component includes a bidirectional blade impeller (15), a waterproof and breathable device (23), an aerosol cooling adhesive (19), and a heat dissipation aluminum plate (16); the aerosol cooling adhesive is assembled on the heat dissipation aluminum plate; the waterproof and breathable device is embedded between the outer side wall of the upper part of the Venturi glass tube and the inner side wall of the upper part of the open copper tube, and is used to drive the bidirectional blade impeller to rotate through the vaporized gas pressure difference to generate bidirectional airflow for self-heating. The flow-guiding heat dissipation component, the liquid exchange heat dissipation component, the self-heating component, and the thermal expansion adaptive mechanism work together to achieve adaptive cooling of the electronic water pump under the combined conditions of extremely high temperature environment and its own operation heat dissipation.

2. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The difference in thermal conductivity between the open copper tube and the Venturi glass tube creates a vapor channel between them. The vapor generated by the vaporization of the high-temperature liquid forms a stable pressure difference within this channel, which provides the initial driving force for the high-temperature liquid, achieving the first pressurization. The Venturi glass tube includes a tapered inlet section and a throat outlet section. After the high-temperature liquid enters through the tapered inlet section, the flow rate is doubled due to the contraction and flow restriction at the throat outlet section, completing the second pressurization. The diameter of the inlet end of the transition circular tube is larger than that of the outlet end. Through the contraction effect of the conical channel, the high-temperature liquid after the second pressurization is further accelerated and pressurized, achieving the third pressurization. The high-temperature liquid after the three-stage pressurization is then introduced into the liquid exchange tank through the transition circular tube.

3. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The thermal expansion device is made of rubber. The U-shaped spring is engaged between the rotor assembly and the arc-shaped slide bar device. A sliding space is reserved between the arc-shaped slide bar device and the stator plastic-coated assembly. When the temperature rises, the thermal expansion device expands symmetrically on both sides along the inside and outside of the pump body, pushing the U-shaped spring to spring outward synchronously, and driving the arc-shaped slide bar device to slide towards the stator plastic-coated assembly, thereby adjusting the flow channel gap between the arc-shaped slide bar device and the open copper tube.

4. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The airflow generated by the rotation of the upper blade of the bidirectional blade impeller acts on the liquid exchange tank and the stator plastic-coated assembly through the air passage (11) for heat dissipation, and the airflow generated by the rotation of the lower blade of the bidirectional blade impeller acts on the controller below the heat dissipation aluminum plate for heat dissipation.

5. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The pump head and the pump body (24) are sealed together by the pump body sealing ring (21), and the heat dissipation aluminum plate is sealed together with the pump body by the heat dissipation aluminum plate sealing ring (17).

6. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The aerogel is composed of a variety of metal particles, with a thermal conductivity as low as 0.013 W / (mK) and a temperature resistance rating as high as 650℃.

7. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The stator plastic-coated assembly is covered on the outside of the stator assembly. The rotor assembly is coaxially arranged inside the stator assembly. The rotor assembly is supported by bearings (14) and rotates relative to the stator assembly under the drive of the magnetic field generated by the stator assembly, thereby converting electrical energy into mechanical energy to drive the pump.

8. The electronic water pump with extreme high temperature self-adaptation according to claim 7, characterized in that: The fluid exchange tank is located below the fixed shaft in the stator assembly, and the bidirectional blade impeller is connected to the lower end of the fixed shaft through bearings.

9. The electronic water pump with extreme high temperature self-adaptation according to claim 1, characterized in that: The number of arc-shaped sliding rod devices corresponds to the number of open copper tubes. Each arc-shaped sliding rod device includes a cylindrical end and an arc-shaped tail. The cylindrical end and the arc-shaped tail are connected by a connecting rod, and the cylindrical end slides to cover the inlet end of the open copper tube.

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